Blade-sharfening mechanism



May 17 1927.

C. A. STRAND BLADE SHARPENING MECHANISM Filed March 14, 1921 1;em--i-rer ewes PATENT mm.

Fe c ed Max 17, 1927. 1,628?

i I enhnnna A; 8mm), or cmoheqintmors.

i i AM i nLADn-smmmue mncnemsm. li iiiniection and hatch 14,1621. aerial m. 452,136.

heating oerriage 1 niounted directly on; the

a main hene member 011blade edge-cngaging ee me W 1. member, 9 %l e-: n ne.h e e e; d t t mg means adwnted to Fig. 6 s a iew inend eleyation of the i {Ilfisjimfntifih reletes go that c t s of Wwhee ee mw the m li l f d h eepwem eel it p g 1J5 e hllaqle in frictl qnalen n g ige t i e Wee 2 the teed! leve w th ew i i he ie d ee eet whe e r gret ie-W l e' eeme we mechenism ehown inFigmo, looking: from the right side of said 'figiure. i d i i In the form of improvedblade-sharpening devicewshown in Figs. 1 to 4 inclueive the e on "end wlth respee te thedirecmain hone member or blade-engagingand t p 9f t e pa of movement of theblegle. r fi ei t elem ef th n w it e I g mie da s n p e eepnoxnleal clent q-stepe me i ew hearte to enab ejefetywrezqrt L or islm ler blades, with e pqyg d ar l' d n frrctroi tl endent W e eur irnee of the hone ()1' tnwni jde-e' e? glngj hone member, to eneble t e to be inverted, 1111C inserted the deire il inclined position, and W remov d and re uted with facility end 111 et} nggnner, ahd all in sue n I amhe es lehledfig tebe sherpene by i er llled wor i n illed operators wlfh ife ilit yfand by, him e an efllclent means,

plate of metal, such {ascold rolled steel although it is obvious that in View of [the disclosure and description aboveset forth the plate 41 may be bent orcnrved so as to have the slightly curved upper surfeee alreadyv deseribedfin connection vith the hone plate ,1 and the flat plate 41 with its flat top blade-edge-engaging and shn'pen .ing surface may be mounted on the base 2 in the place of the plate 1 if desired. d

steel or other suitable metal for frictionally engaging and Sher ening the edge of a razor blade or similar e ged tool isimonnted on a sheet metaltbese42 and secured in place by means of bent lugs 43 which may be integral with thehase and bent over the adjacent nergine of the hone plate 41. Parallel gelding trackeilr, e4 are provided on opposite sidemargins of the hone lait/e41 and aseAZe d may be fixed tenor llllflgl'allwltll l either sai hone plate or base plate, or ntiq fiked relation to the same. (See igs. 1 and :3.) Slidably and reoiprocatingly mounted on the tracks 44, 44, is e mmerse carriage 45, which may be for-11ml qf sh tmetal bentor stamped to shape, and iI'fl nSYerSely across ,and 1 above the tap surface of thethone plate 4.1 with the o s ite; extremities of the carriage in their and gcprth r ebjects "of the invenion will appeqr tom fOllQYVII Lg desg ription end 0 aimerand from 1n, eci e t em ty ng a i rw wh htrermade a part 0 tlusspeeificetion.

constructibn i c te "minke 9e e e ee freof arl porting earriajgge nnd ,ilrec hl'nhi he ieid ludm rep ir ofinn agernent with the said tracks. edible; bladee loeete'd be Butt s cr legs 46, 46 onthe oppo- W'en the trclrs 11d mqveh e bee "and of e carriage are adapted to extend cover, and beneath the; correspond ing de tjice shown in Fi' 1, lpolrinlzin the directi onjlrfdlf etecl t 6 errows'i w i W mg ernent with, the tracks and end 3 ls n View;ln end elevationnf the lugs gram the ends of the tracks, serve med n sln shown In Flg. 1, looking from t9 lmnt movement of the carriage end- Wise it emek and to renentthe carbeinghefldentel vy displaced i} fq'l'm 46; wh1ehtmay be. substantially ear -thi i th i.

rf he r btmew hfih m W 'prosharpening hone plate .41 consists of a flat i The stamped flat plate 4101 cold mllml position and in slid-- mme ly mo nt d 01 i h t e :Ieg

"the sleeve being pivotally connected with the carriage by means of perforated lugs or uprights L7, 47 which may be integral with the carriage andbent upward from the side margins thereof, a pivotpin or-axle l8 beiiiign'iouiued in the perforationsin the upper extremities of said lugs and extendingthrough a sleeve or socket 41.9 formed onthe arm at? andex-- tending parallel to the tracks and in giarallel relation to thedirect-ion of movement of the reciprocating bladeesupportin g and guiding carriage on which the pivoted arm l-(l is pivotally supported I or. hinged.

The pivoted arm 46 has an upright llange portion 50,'to whiclris adjustably secured a clamp-supportingmember 51, which is adjustably connected with the flange 50 of the arm 46 by means of 'a screw 52, or other suitable securing means, A pin 53 extending through the flange 50 and adjustable clamp-supporting member51 isadapted to secure said parts in adjustable relation, and the screw 52 serves to hold the slotted adjustable member 51'having a segmental slot 54L therein, in place. The adjustable clampsupporting'mcmber 51 has an integral inclined sleeve 55 formed on its lower margin, said sleeveextending upward and rearward at an incline in oblique relation to the top surface of the hone plate member 41, and in a vertical plane which is parallel with respect to the directionot the path of movementof the blade and blade-supporting and guiding mechanism, and in parallel relation to and between the parallel tracks 44, 4%.

' Blade clamping mechanism identical with that already described maybe mounted in However, I have shown in Figs 1 to 4 inclusive'a pair of blade-clamping jaws comprising a lower clamping jaw 56 having a fixed stem 57 extending upward and rearward at an incline and 'journaled in the sleeve 55, so as to form an axle adapted to permit the clamping jaws, and

a blade clamped'between the jaws, to be inverted .by raising the arm/l6 oniits pivot 41:8. Said lower clamping jaw and stem may be identical in construction with the lower jaw 18 already described, and the stem 20. And an upperclamping jaw 58 whichimay be identical with the upper jaw 24, with its lever arm '28,is hinged to'the lower jaw 56 byv means of side hin es 59, in thesame imanner in which the aws 18 and 24 are connected. The upper clamping jaw 58 has [a rearwardly projectinglever arm 60 fixed thereto and extending outside of and entirely across the sleeve 55; and a sleeve or cap 61 is mountedon the end of the stem 57 and provided with a compressible spring 62 mounted between the upper end of the lever arm 60, andthe stem or sleeve, and adapted to yieldingly hold the rear or engaged end of the lever 60in raised'position, and thereby hold V the clamping jaws in clamping engagethe upper face 01 ment with the safety razor blade clamped therebetween. The clamping jaw 58 maybe 'aised out of clamping engagement with the blade by pressing down on the lever arm 61) and con'iprc niug lllv, spring ($15. lt ll )lll\l e noted that the clan'iping jaws b6 and 55, as: well as the clamping jaws 1S and ll are supported upon inclined axles which are each in a vertical plane parallel to the tracks, and also parallel to the direction o'l move mentot the jaws and blade to be sharpened, the direction ol. movement of the blade, in each instance, being at right angles to the edge of the blade. In other words, the edge of the blade is'at right angles to the direction of movementof the blade, and the body of the blade is inclined; and the axle of each pair of clamping jaws is rotatable in a vertical plane which is parallel to the direction of movement of the blade and aws, to per- 'tudinally serves to enable the edge of the blade to be somewhat hollow ground, and made very sharp, without the necessity of employing a skilled operator.

The degree of curvature or concavity of the hone member 1 is, of course very slight, the depth of the deepest part of the depression or curvature being, by preference. less than one hundredth part of an inch. and gradually merging into the substantially fiat surface of that portion of the plate which is flat or substantially fiat transversely of the plate or hone.

In the form of device embodying my invention, as shown in Figs. 5 and 6, a main hone member or blade-edge-engaging and sharpening metallic hone plate (33, formed of a plate of flat cold rolled steel or other suitable metal stamped to form a main hone member of the desired dimensions, is mounted on a suitable base 6st of stamped sheet metal, in such position that the opposite side edges (35, 65 of said hone plate 63 are supported in position to enable a transverse carriage G6 to be slidably mounted on the hone member 63, with the opposite flanged side margins or edges 67 folded over and beneath the corresponding edge of the plate 63, and. in sliding engagement with the same.

The carriage may be made of sheet metal stamped. and bent in the form shown in the drawings, or in suitable form to reciprocate or slide back' and forth over the main hone member 63. And lugs 68-68 integral with the sheet metal body of the carriage form a support for a pivot pin or axle 69 mounted therein and extending parallel to the top of the main hone member and parallel to the direction of the path of movement of the carriage, and on which the sleeve or socket portion '70 of the bladesupporting pivoted arm 71 is pivotally mounted. ()n the arm 71 is an inclined sleeve 72 which may be of identical construction with the adjustable sleeve member 12, and sleeve 13 already described. And blade clamping jaw mechanism of identical construction with the jaws 18 and 24-, and the stem and means for opening and closingand inverting said jaws, may be and is mounted in the sleeve 72. The jaws 18 and 24, and lever 28 and stem 20 thus supported by the sleeve 72 on the pivoted arm 71, may be operated by the eccentric 32 on the cam sleeve 31 in the manner already described in connection with Figures 1 to 6 inclusive of the drawings.

Although I prefer to employ a metallic main hone member such as the hone members 1, 4:1 or 63, the hone member or hone proper against which the blades are to be sharpened may be of suitable stone, slate, or composition or any suitable material for sharpening a blade requiring a sharpe edge such as a safety razor blade.

The metallic hone plate 1 is, by preference, of uniform thickness throughout, and made by stamping a flat plate or sheet of cold rolled steel or similar metallic sheet, in an ordinary die press thus very slightly bending the plate as described, although the top surface of the plate may be shaped or ground so as to have the desired slight curvature, or desired shape, and may be perfectly flat if desired, though I prefer that it should be very slightly bent as above described.

I claim: 1. In a blade-sharpening device of the class described, the combination of a hone,

a reciprocating carriage operatively connected with and movable longitudinally of said hone, a clampsupporting arm pivotally connected with and supported on said carriage and adapted to swing in a plane transverse to the path of movement of the carriage, a pair of inclined invertible bladeclamping jaws having their lower blade-engagingmargins transverse to the hone and in transverse relation to the path of movement of said carriage, and provided with an inclined axle in supporting engagement with said clamping jaws and rockingly mounted in normally inclined position in said pivoted clamp-supporting arm, and means for securing said clamping jaws in clamping engagement with a blade to be sharpened.

2. In a blade-sharpening device of the class described, the combination of a hone member, a reciprocating blade-supporting carriage extending transversely across and having its opposite sides supported in movable relation to and on opposite sides of said hone member, a hinged clampsupporting arm mounted on the carriage, and a pair of inclined blade-clamping jaws invertibly supported upon said hinged clamp-support ing arm and adapted to invertibly support a blade in inclined position in frictional engagement with the surface of the hone member.

Signed at Chicago, in' the county of Cook and State of Illinois, this 5th day of March,

CHARLES A. STRAND.

tit) 

